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A generalized method for determining radiation patterns of aperture antennas and its application to reflector antennasThe reflector antenna may be thought of as an aperture antenna. The classical solution for the radiation pattern of such an antenna is found by the aperture integration (AI) method. Success with this method depends on how accurately the aperture currents are known beforehand. In the past, geometrical optics (GO) has been employed to find the aperture currents. This approximation is suitable for calculating the main beam and possibly the first few sidelobes. A better approximation is to use aperture currents calculated from the geometrical theory of diffraction (GTD). Integration of the GTD currents over and extended aperture yields more accurate results for the radiation pattern. This approach is useful when conventional AI and GTD solutions have no common region of validity. This problem arises in reflector antennas. Two dimensional models of parabolic reflectors are studied; however, the techniques discussed can be applied to any aperture antenna.
Document ID
19830002054
Acquisition Source
Legacy CDMS
Document Type
Thesis/Dissertation
Authors
Paknys, J. R.
(Ohio State Univ. Columbus, OH, United States)
Date Acquired
September 4, 2013
Publication Date
September 1, 1982
Subject Category
Communications And Radar
Report/Patent Number
NAS 1.26:169449
NASA-CR-169449
ESL-711965-11
Report Number: NAS 1.26:169449
Report Number: NASA-CR-169449
Report Number: ESL-711965-11
Accession Number
83N10324
Funding Number(s)
CONTRACT_GRANT: NSG-1498
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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